The Random Variable X Represents the Number of Tests That

Multiple Choice

The random variable x represents the number of tests that a patient entering a clinic will have along with the corresponding probabilities. Find the mean and standard deviation for the random variable x.

A) mean: 3.72; standard deviation: 2.52
B) mean: 2.52; standard deviation: 1.93
C) mean: 1.59; standard deviation: 1.09
D) mean: 1.59; standard deviation: 3.72